2016-04-07 19:03:23 +07:00
|
|
|
/*
|
|
|
|
* Copyright (c) 2015, Linaro Limited, Shannon Zhao
|
|
|
|
*
|
|
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
|
|
* under the terms and conditions of the GNU General Public License,
|
|
|
|
* version 2, as published by the Free Software Foundation.
|
|
|
|
*
|
|
|
|
* This program is distributed in the hope it will be useful, but WITHOUT
|
|
|
|
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
|
|
|
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
|
|
|
|
* more details.
|
|
|
|
*
|
|
|
|
* You should have received a copy of the GNU General Public License
|
|
|
|
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
*/
|
|
|
|
|
|
|
|
#include <linux/platform_device.h>
|
|
|
|
#include <linux/acpi.h>
|
|
|
|
#include <xen/xen.h>
|
|
|
|
#include <xen/page.h>
|
|
|
|
#include <xen/interface/memory.h>
|
|
|
|
#include <asm/xen/hypervisor.h>
|
|
|
|
#include <asm/xen/hypercall.h>
|
|
|
|
|
|
|
|
static int xen_unmap_device_mmio(const struct resource *resources,
|
|
|
|
unsigned int count)
|
|
|
|
{
|
|
|
|
unsigned int i, j, nr;
|
|
|
|
int rc = 0;
|
|
|
|
const struct resource *r;
|
|
|
|
struct xen_remove_from_physmap xrp;
|
|
|
|
|
|
|
|
for (i = 0; i < count; i++) {
|
|
|
|
r = &resources[i];
|
|
|
|
nr = DIV_ROUND_UP(resource_size(r), XEN_PAGE_SIZE);
|
|
|
|
if ((resource_type(r) != IORESOURCE_MEM) || (nr == 0))
|
|
|
|
continue;
|
|
|
|
|
|
|
|
for (j = 0; j < nr; j++) {
|
|
|
|
xrp.domid = DOMID_SELF;
|
|
|
|
xrp.gpfn = XEN_PFN_DOWN(r->start) + j;
|
|
|
|
rc = HYPERVISOR_memory_op(XENMEM_remove_from_physmap,
|
|
|
|
&xrp);
|
|
|
|
if (rc)
|
|
|
|
return rc;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
return rc;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int xen_map_device_mmio(const struct resource *resources,
|
|
|
|
unsigned int count)
|
|
|
|
{
|
|
|
|
unsigned int i, j, nr;
|
|
|
|
int rc = 0;
|
|
|
|
const struct resource *r;
|
|
|
|
xen_pfn_t *gpfns;
|
|
|
|
xen_ulong_t *idxs;
|
|
|
|
int *errs;
|
|
|
|
|
|
|
|
for (i = 0; i < count; i++) {
|
2016-12-28 07:47:32 +07:00
|
|
|
struct xen_add_to_physmap_range xatp = {
|
|
|
|
.domid = DOMID_SELF,
|
|
|
|
.space = XENMAPSPACE_dev_mmio
|
|
|
|
};
|
|
|
|
|
2016-04-07 19:03:23 +07:00
|
|
|
r = &resources[i];
|
|
|
|
nr = DIV_ROUND_UP(resource_size(r), XEN_PAGE_SIZE);
|
|
|
|
if ((resource_type(r) != IORESOURCE_MEM) || (nr == 0))
|
|
|
|
continue;
|
|
|
|
|
treewide: kzalloc() -> kcalloc()
The kzalloc() function has a 2-factor argument form, kcalloc(). This
patch replaces cases of:
kzalloc(a * b, gfp)
with:
kcalloc(a * b, gfp)
as well as handling cases of:
kzalloc(a * b * c, gfp)
with:
kzalloc(array3_size(a, b, c), gfp)
as it's slightly less ugly than:
kzalloc_array(array_size(a, b), c, gfp)
This does, however, attempt to ignore constant size factors like:
kzalloc(4 * 1024, gfp)
though any constants defined via macros get caught up in the conversion.
Any factors with a sizeof() of "unsigned char", "char", and "u8" were
dropped, since they're redundant.
The Coccinelle script used for this was:
// Fix redundant parens around sizeof().
@@
type TYPE;
expression THING, E;
@@
(
kzalloc(
- (sizeof(TYPE)) * E
+ sizeof(TYPE) * E
, ...)
|
kzalloc(
- (sizeof(THING)) * E
+ sizeof(THING) * E
, ...)
)
// Drop single-byte sizes and redundant parens.
@@
expression COUNT;
typedef u8;
typedef __u8;
@@
(
kzalloc(
- sizeof(u8) * (COUNT)
+ COUNT
, ...)
|
kzalloc(
- sizeof(__u8) * (COUNT)
+ COUNT
, ...)
|
kzalloc(
- sizeof(char) * (COUNT)
+ COUNT
, ...)
|
kzalloc(
- sizeof(unsigned char) * (COUNT)
+ COUNT
, ...)
|
kzalloc(
- sizeof(u8) * COUNT
+ COUNT
, ...)
|
kzalloc(
- sizeof(__u8) * COUNT
+ COUNT
, ...)
|
kzalloc(
- sizeof(char) * COUNT
+ COUNT
, ...)
|
kzalloc(
- sizeof(unsigned char) * COUNT
+ COUNT
, ...)
)
// 2-factor product with sizeof(type/expression) and identifier or constant.
@@
type TYPE;
expression THING;
identifier COUNT_ID;
constant COUNT_CONST;
@@
(
- kzalloc
+ kcalloc
(
- sizeof(TYPE) * (COUNT_ID)
+ COUNT_ID, sizeof(TYPE)
, ...)
|
- kzalloc
+ kcalloc
(
- sizeof(TYPE) * COUNT_ID
+ COUNT_ID, sizeof(TYPE)
, ...)
|
- kzalloc
+ kcalloc
(
- sizeof(TYPE) * (COUNT_CONST)
+ COUNT_CONST, sizeof(TYPE)
, ...)
|
- kzalloc
+ kcalloc
(
- sizeof(TYPE) * COUNT_CONST
+ COUNT_CONST, sizeof(TYPE)
, ...)
|
- kzalloc
+ kcalloc
(
- sizeof(THING) * (COUNT_ID)
+ COUNT_ID, sizeof(THING)
, ...)
|
- kzalloc
+ kcalloc
(
- sizeof(THING) * COUNT_ID
+ COUNT_ID, sizeof(THING)
, ...)
|
- kzalloc
+ kcalloc
(
- sizeof(THING) * (COUNT_CONST)
+ COUNT_CONST, sizeof(THING)
, ...)
|
- kzalloc
+ kcalloc
(
- sizeof(THING) * COUNT_CONST
+ COUNT_CONST, sizeof(THING)
, ...)
)
// 2-factor product, only identifiers.
@@
identifier SIZE, COUNT;
@@
- kzalloc
+ kcalloc
(
- SIZE * COUNT
+ COUNT, SIZE
, ...)
// 3-factor product with 1 sizeof(type) or sizeof(expression), with
// redundant parens removed.
@@
expression THING;
identifier STRIDE, COUNT;
type TYPE;
@@
(
kzalloc(
- sizeof(TYPE) * (COUNT) * (STRIDE)
+ array3_size(COUNT, STRIDE, sizeof(TYPE))
, ...)
|
kzalloc(
- sizeof(TYPE) * (COUNT) * STRIDE
+ array3_size(COUNT, STRIDE, sizeof(TYPE))
, ...)
|
kzalloc(
- sizeof(TYPE) * COUNT * (STRIDE)
+ array3_size(COUNT, STRIDE, sizeof(TYPE))
, ...)
|
kzalloc(
- sizeof(TYPE) * COUNT * STRIDE
+ array3_size(COUNT, STRIDE, sizeof(TYPE))
, ...)
|
kzalloc(
- sizeof(THING) * (COUNT) * (STRIDE)
+ array3_size(COUNT, STRIDE, sizeof(THING))
, ...)
|
kzalloc(
- sizeof(THING) * (COUNT) * STRIDE
+ array3_size(COUNT, STRIDE, sizeof(THING))
, ...)
|
kzalloc(
- sizeof(THING) * COUNT * (STRIDE)
+ array3_size(COUNT, STRIDE, sizeof(THING))
, ...)
|
kzalloc(
- sizeof(THING) * COUNT * STRIDE
+ array3_size(COUNT, STRIDE, sizeof(THING))
, ...)
)
// 3-factor product with 2 sizeof(variable), with redundant parens removed.
@@
expression THING1, THING2;
identifier COUNT;
type TYPE1, TYPE2;
@@
(
kzalloc(
- sizeof(TYPE1) * sizeof(TYPE2) * COUNT
+ array3_size(COUNT, sizeof(TYPE1), sizeof(TYPE2))
, ...)
|
kzalloc(
- sizeof(TYPE1) * sizeof(THING2) * (COUNT)
+ array3_size(COUNT, sizeof(TYPE1), sizeof(TYPE2))
, ...)
|
kzalloc(
- sizeof(THING1) * sizeof(THING2) * COUNT
+ array3_size(COUNT, sizeof(THING1), sizeof(THING2))
, ...)
|
kzalloc(
- sizeof(THING1) * sizeof(THING2) * (COUNT)
+ array3_size(COUNT, sizeof(THING1), sizeof(THING2))
, ...)
|
kzalloc(
- sizeof(TYPE1) * sizeof(THING2) * COUNT
+ array3_size(COUNT, sizeof(TYPE1), sizeof(THING2))
, ...)
|
kzalloc(
- sizeof(TYPE1) * sizeof(THING2) * (COUNT)
+ array3_size(COUNT, sizeof(TYPE1), sizeof(THING2))
, ...)
)
// 3-factor product, only identifiers, with redundant parens removed.
@@
identifier STRIDE, SIZE, COUNT;
@@
(
kzalloc(
- (COUNT) * STRIDE * SIZE
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
|
kzalloc(
- COUNT * (STRIDE) * SIZE
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
|
kzalloc(
- COUNT * STRIDE * (SIZE)
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
|
kzalloc(
- (COUNT) * (STRIDE) * SIZE
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
|
kzalloc(
- COUNT * (STRIDE) * (SIZE)
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
|
kzalloc(
- (COUNT) * STRIDE * (SIZE)
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
|
kzalloc(
- (COUNT) * (STRIDE) * (SIZE)
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
|
kzalloc(
- COUNT * STRIDE * SIZE
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
)
// Any remaining multi-factor products, first at least 3-factor products,
// when they're not all constants...
@@
expression E1, E2, E3;
constant C1, C2, C3;
@@
(
kzalloc(C1 * C2 * C3, ...)
|
kzalloc(
- (E1) * E2 * E3
+ array3_size(E1, E2, E3)
, ...)
|
kzalloc(
- (E1) * (E2) * E3
+ array3_size(E1, E2, E3)
, ...)
|
kzalloc(
- (E1) * (E2) * (E3)
+ array3_size(E1, E2, E3)
, ...)
|
kzalloc(
- E1 * E2 * E3
+ array3_size(E1, E2, E3)
, ...)
)
// And then all remaining 2 factors products when they're not all constants,
// keeping sizeof() as the second factor argument.
@@
expression THING, E1, E2;
type TYPE;
constant C1, C2, C3;
@@
(
kzalloc(sizeof(THING) * C2, ...)
|
kzalloc(sizeof(TYPE) * C2, ...)
|
kzalloc(C1 * C2 * C3, ...)
|
kzalloc(C1 * C2, ...)
|
- kzalloc
+ kcalloc
(
- sizeof(TYPE) * (E2)
+ E2, sizeof(TYPE)
, ...)
|
- kzalloc
+ kcalloc
(
- sizeof(TYPE) * E2
+ E2, sizeof(TYPE)
, ...)
|
- kzalloc
+ kcalloc
(
- sizeof(THING) * (E2)
+ E2, sizeof(THING)
, ...)
|
- kzalloc
+ kcalloc
(
- sizeof(THING) * E2
+ E2, sizeof(THING)
, ...)
|
- kzalloc
+ kcalloc
(
- (E1) * E2
+ E1, E2
, ...)
|
- kzalloc
+ kcalloc
(
- (E1) * (E2)
+ E1, E2
, ...)
|
- kzalloc
+ kcalloc
(
- E1 * E2
+ E1, E2
, ...)
)
Signed-off-by: Kees Cook <keescook@chromium.org>
2018-06-13 04:03:40 +07:00
|
|
|
gpfns = kcalloc(nr, sizeof(xen_pfn_t), GFP_KERNEL);
|
|
|
|
idxs = kcalloc(nr, sizeof(xen_ulong_t), GFP_KERNEL);
|
|
|
|
errs = kcalloc(nr, sizeof(int), GFP_KERNEL);
|
2016-04-07 19:03:23 +07:00
|
|
|
if (!gpfns || !idxs || !errs) {
|
|
|
|
kfree(gpfns);
|
|
|
|
kfree(idxs);
|
|
|
|
kfree(errs);
|
|
|
|
rc = -ENOMEM;
|
|
|
|
goto unmap;
|
|
|
|
}
|
|
|
|
|
|
|
|
for (j = 0; j < nr; j++) {
|
|
|
|
/*
|
|
|
|
* The regions are always mapped 1:1 to DOM0 and this is
|
|
|
|
* fine because the memory map for DOM0 is the same as
|
|
|
|
* the host (except for the RAM).
|
|
|
|
*/
|
|
|
|
gpfns[j] = XEN_PFN_DOWN(r->start) + j;
|
|
|
|
idxs[j] = XEN_PFN_DOWN(r->start) + j;
|
|
|
|
}
|
|
|
|
|
|
|
|
xatp.size = nr;
|
|
|
|
|
|
|
|
set_xen_guest_handle(xatp.gpfns, gpfns);
|
|
|
|
set_xen_guest_handle(xatp.idxs, idxs);
|
|
|
|
set_xen_guest_handle(xatp.errs, errs);
|
|
|
|
|
|
|
|
rc = HYPERVISOR_memory_op(XENMEM_add_to_physmap_range, &xatp);
|
|
|
|
kfree(gpfns);
|
|
|
|
kfree(idxs);
|
|
|
|
kfree(errs);
|
|
|
|
if (rc)
|
|
|
|
goto unmap;
|
|
|
|
}
|
|
|
|
|
|
|
|
return rc;
|
|
|
|
|
|
|
|
unmap:
|
|
|
|
xen_unmap_device_mmio(resources, i);
|
|
|
|
return rc;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int xen_platform_notifier(struct notifier_block *nb,
|
|
|
|
unsigned long action, void *data)
|
|
|
|
{
|
|
|
|
struct platform_device *pdev = to_platform_device(data);
|
|
|
|
int r = 0;
|
|
|
|
|
|
|
|
if (pdev->num_resources == 0 || pdev->resource == NULL)
|
|
|
|
return NOTIFY_OK;
|
|
|
|
|
|
|
|
switch (action) {
|
|
|
|
case BUS_NOTIFY_ADD_DEVICE:
|
|
|
|
r = xen_map_device_mmio(pdev->resource, pdev->num_resources);
|
|
|
|
break;
|
|
|
|
case BUS_NOTIFY_DEL_DEVICE:
|
|
|
|
r = xen_unmap_device_mmio(pdev->resource, pdev->num_resources);
|
|
|
|
break;
|
|
|
|
default:
|
|
|
|
return NOTIFY_DONE;
|
|
|
|
}
|
|
|
|
if (r)
|
|
|
|
dev_err(&pdev->dev, "Platform: Failed to %s device %s MMIO!\n",
|
|
|
|
action == BUS_NOTIFY_ADD_DEVICE ? "map" :
|
|
|
|
(action == BUS_NOTIFY_DEL_DEVICE ? "unmap" : "?"),
|
|
|
|
pdev->name);
|
|
|
|
|
|
|
|
return NOTIFY_OK;
|
|
|
|
}
|
|
|
|
|
|
|
|
static struct notifier_block platform_device_nb = {
|
|
|
|
.notifier_call = xen_platform_notifier,
|
|
|
|
};
|
|
|
|
|
|
|
|
static int __init register_xen_platform_notifier(void)
|
|
|
|
{
|
|
|
|
if (!xen_initial_domain() || acpi_disabled)
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
return bus_register_notifier(&platform_bus_type, &platform_device_nb);
|
|
|
|
}
|
|
|
|
|
|
|
|
arch_initcall(register_xen_platform_notifier);
|
2016-04-07 19:03:24 +07:00
|
|
|
|
|
|
|
#ifdef CONFIG_ARM_AMBA
|
|
|
|
#include <linux/amba/bus.h>
|
|
|
|
|
|
|
|
static int xen_amba_notifier(struct notifier_block *nb,
|
|
|
|
unsigned long action, void *data)
|
|
|
|
{
|
|
|
|
struct amba_device *adev = to_amba_device(data);
|
|
|
|
int r = 0;
|
|
|
|
|
|
|
|
switch (action) {
|
|
|
|
case BUS_NOTIFY_ADD_DEVICE:
|
|
|
|
r = xen_map_device_mmio(&adev->res, 1);
|
|
|
|
break;
|
|
|
|
case BUS_NOTIFY_DEL_DEVICE:
|
|
|
|
r = xen_unmap_device_mmio(&adev->res, 1);
|
|
|
|
break;
|
|
|
|
default:
|
|
|
|
return NOTIFY_DONE;
|
|
|
|
}
|
|
|
|
if (r)
|
|
|
|
dev_err(&adev->dev, "AMBA: Failed to %s device %s MMIO!\n",
|
|
|
|
action == BUS_NOTIFY_ADD_DEVICE ? "map" :
|
|
|
|
(action == BUS_NOTIFY_DEL_DEVICE ? "unmap" : "?"),
|
|
|
|
adev->dev.init_name);
|
|
|
|
|
|
|
|
return NOTIFY_OK;
|
|
|
|
}
|
|
|
|
|
|
|
|
static struct notifier_block amba_device_nb = {
|
|
|
|
.notifier_call = xen_amba_notifier,
|
|
|
|
};
|
|
|
|
|
|
|
|
static int __init register_xen_amba_notifier(void)
|
|
|
|
{
|
|
|
|
if (!xen_initial_domain() || acpi_disabled)
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
return bus_register_notifier(&amba_bustype, &amba_device_nb);
|
|
|
|
}
|
|
|
|
|
|
|
|
arch_initcall(register_xen_amba_notifier);
|
|
|
|
#endif
|